公开(公告)号：US5287341A

公开(公告)日：1994-02-15

申请号：US842546

申请日：1992-02-27

申请人： Tadashi Ozue ,  Yoshiteru Kamatani ,  Takuya Kaeriyama

发明人： Tadashi Ozue ,  Yoshiteru Kamatani ,  Takuya Kaeriyama

IPC分类号： G11B7/09 ,  G11B7/003 ,  G11B15/61 ,  G11B15/64 ,  G11B3/74

CPC分类号： G11B7/0031 ,  G11B15/61 ,  G11B15/64

摘要： A rotating intermediate drum having mounted thereon optical head is made smaller than stationary upper and lower drums in diameter and spiral grooves are formed on the rotating intermediate drum on its surfaces opposing the stationary upper and lower drums. An optical tape is transported in a floated condition relative to a drum circumferential surface owing to a synergy of a dynamic pressure based on the rotation of the rotating intermediate drum and the air exhausted from the spiral grooves. Therefore, an information signal is recorded on and/or reproduced from the optical tape when the optical tape is transported in the floated condition from the head drum having the trilayer structure composed of the stationary upper and lower drums and the rotating intermediate drum therebetween.

摘要翻译： 其上安装有光学头的旋转中间鼓被制成小于直径固定的上下鼓，并且在与静止的上鼓和下滚筒相对的表面上的旋转中间滚筒上形成螺旋槽。 由于基于旋转的中间鼓的旋转和从螺旋槽排出的空气的动态压力的协同作用，光学带相对于鼓圆周表面以浮动状态运输。 因此，当光学带从具有由固定的上，下鼓组成的三层结构的磁头鼓和其间的旋转的中间滚筒的磁头鼓传送时，信息信号被记录在光带上和/或从光带再现。

公开(公告)号：US06411473B1

公开(公告)日：2002-06-25

申请号：US09262328

申请日：1999-03-04

申请人： Tadashi Ozue ,  Toshio Shirai ,  Yoshiteru Kamatani

发明人： Tadashi Ozue ,  Toshio Shirai ,  Yoshiteru Kamatani

IPC分类号： G11B1561

CPC分类号： G11B15/61 ,  G11B5/0086 ,  G11B5/534

摘要： A rotary drum device and a helical scan magnetic recording/reproducing apparatus employing an MR head as a playback magnetic head. The rotary drum device and the helical scan magnetic recording/reproducing apparatus each include a cylindrically-shaped rotary drum, an inductive magnetic head loaded on the rotary drum so that its portion is protruded from the outer periphery of the rotary drum and a magneto-resistive effect magnetic head loaded on the rotary drum so that its portion is protruded from the outer periphery of the rotary drum. An amount of protrusion from the outer periphery of the rotary drum of the magneto-resistive effect magnetic head is smaller than an amount of protrusion from the outer periphery of the rotary drum of the inductive magnetic head.

摘要翻译： 旋转鼓装置和使用MR头作为重放磁头的螺旋扫描磁记录/再现装置。 旋转鼓装置和螺旋扫描磁记录/再现装置各自包括圆柱形旋转鼓，负载在旋转磁鼓上的感应磁头，使得其部分从旋转磁鼓的外周突出并具有磁阻 将磁头加载到旋转磁鼓上，使其部分从旋转磁鼓的外周突出。 来自磁阻效应磁头的旋转磁鼓的外周的突出量小于从感应磁头的旋转磁鼓的外周突出的量。

公开(公告)号：US06765738B1

公开(公告)日：2004-07-20

申请号：US09552749

申请日：2000-04-19

申请人： Yoshiteru Kamatani ,  Tadashi Ozue

发明人： Yoshiteru Kamatani ,  Tadashi Ozue

IPC分类号： G11B509

CPC分类号： G11B5/3906 ,  G11B5/0086

摘要： A method for detecting the degree of wear of a magneto-resistance (MR) effect type magnetic head element for reading a magnetic signal by use of a simple structure is disclosed. The degree of wear of an MR head for reading a magnetic signal from a magnetic tape is detected based on a value of resistance of an MR element by a head wear detecting circuit. A signal indicative of the degree of wear of the MR head is supplied to an alarm generating circuit for example, to generate an alarm informing of the life of the MR head.

摘要翻译： 公开了一种用于通过简单结构检测用于读取磁信号的磁阻（MR）效应型磁头元件的磨损程度的方法。 基于头部磨损检测电路的MR元件的电阻值来检测用于从磁带读取磁信号的MR磁头的磨损程度。 指示MR头的磨损程度的信号例如提供给报警发生电路，以产生通知MR头的寿命的报警。

公开(公告)号：US06304397B1

公开(公告)日：2001-10-16

申请号：US09319509

申请日：1999-08-02

申请人： Tadashi Ozue ,  Toshio Shirai ,  Takehiko Saito ,  Yoshiteru Kamatani ,  Tomohiro Ikegami

发明人： Tadashi Ozue ,  Toshio Shirai ,  Takehiko Saito ,  Yoshiteru Kamatani ,  Tomohiro Ikegami

IPC分类号： G11B502

CPC分类号： G11B5/53 ,  G11B5/0086 ,  G11B5/02 ,  G11B5/09 ,  G11B20/10 ,  G11B23/0007

摘要： A helical scan magnetic recording/reproducing apparatus incorporating an MR head to serve as a reproducing magnetic head is arranged to convert data which is recorded on a magnetic tape into data in the form of DC-free code trains. The magnetic recording/reproducing apparatus is provided with a high-pass filter for attenuating low-frequency components of a reproduced signal detected by the MR head. Moreover, a demodulating circuit is provided which demodulates data in a state before data is converted into the DC-free code trains from the reproduced signal, in which the low-frequency components have been attenuated by said high-pass filter. As a result, noise (thermal asperities) in a low-frequency region caused when the magnetic tape and the MR head are brought into contact with each other is removed so that a reproduced output free from excessive noise is obtained. The high-pass filter is, for example, a rotary transformer mounted on rotational drum.

摘要翻译： 配置有用作再现磁头的MR磁头的螺旋扫描磁记录/再现装置被布置成将记录在磁带上的数据转换为无DC代码列的形式的数据。 磁记录/再现装置设置有用于衰减由MR磁头检测到的再现信号的低频分量的高通滤波器。 此外，提供一种解调电路，其解调从数据被转换成无DC码序列的状态的数据，再生信号中低频分量已被所述高通滤波器衰减。 结果，去除了当磁带和MR磁头相互接触时引起的低频区域中的噪声（热粗糙度），从而获得没有过多噪声的再现输出。 高通滤波器例如是安装在旋转滚筒上的旋转变压器。

公开(公告)号：US06411456B1

公开(公告)日：2002-06-25

申请号：US09262326

申请日：1999-03-04

申请人： Tadashi Ozue ,  Toshio Shirai ,  Yoshiteru Kamatani

发明人： Tadashi Ozue ,  Toshio Shirai ,  Yoshiteru Kamatani

IPC分类号： G11B1518

CPC分类号： G11B5/40 ,  G11B5/0086 ,  G11B5/4893 ,  G11B5/531 ,  G11B15/06 ,  G11B15/43 ,  G11B2005/0013 ,  G11B2005/0016

摘要： A magnetic signal reproducing method and apparatus of the helical scan system employing an MR head. The apparatus includes a substantially cylindrically-shaped rotary drum, an inductive magnetic head loaded on the rotary drum, a magneto-resistive effect magnetic head having an amount of protrusion from the rotary drum smaller than that of the inductive magnetic head, a tape sort detection unit, and a tape tension control unit. If information signals are reproduced by the inductive magnetic head, the tape tension of the magnetic tape is decreased by the tape tension control unit and, if information signals are reproduced by the magneto-resistive effect magnetic head, the tape tension of the magnetic tape is increased by the tape tension control unit.

摘要翻译： 一种使用MR头的螺旋扫描系统的磁信号再现方法和装置。 该装置包括基本上圆柱形的旋转磁鼓，装在旋转磁鼓上的感应磁头，磁阻效应磁头，其旋转磁鼓的突出量小于感应磁头的突出量，磁带分类检测 单元和一个胶带张力控制单元。 如果通过感应磁头再现信息信号，则通过磁带张力控制单元减小磁带的磁带张力，并且如果信息信号被磁阻效应磁头再现，则磁带的磁带张力为 由带张力控制单元增加。

公开(公告)号：US06229662B1

公开(公告)日：2001-05-08

申请号：US09225423

申请日：1999-01-05

申请人： Tadashi Ozue ,  Toshio Shirai ,  Yoshiteru Kamatani ,  Takehiko Saito ,  Tomohiro Ikegami

发明人： Tadashi Ozue ,  Toshio Shirai ,  Yoshiteru Kamatani ,  Takehiko Saito ,  Tomohiro Ikegami

IPC分类号： G11B502

CPC分类号： G11B5/40 ,  G11B5/0086 ,  G11B5/78

摘要： A magnetic recording/reproducing apparatus of the helical scan system employing a MR head as a reproducing magnetic head. The magnetic recording/reproducing apparatus includes a MR head 6 and a rotary drum carrying the MR head 6. In reproducing signals from the magnetic tape 7 in accordance with the helical scan system, a magnetic tape 7, having a large number of projections 7c on the tape surface and containing an electrically conductive material in its magnetic layer, is used as a recording medium.

摘要翻译： 一种使用MR头作为再现磁头的螺旋扫描系统的磁记录/重放装置。 磁记录/再现装置包括MR磁头6和承载MR磁头6的旋转磁鼓。在根据螺旋扫描系统再现来自磁带7的信号时，具有大量突起7c的磁带7 胶带表面并在其磁性层中含有导电材料用作记录介质。

公开(公告)号：US5265084A

公开(公告)日：1993-11-23

申请号：US836915

申请日：1992-02-19

申请人： Tadashi Ozue ,  Yoshiteru Kamatani ,  Tatsuya Narahara

发明人： Tadashi Ozue ,  Yoshiteru Kamatani ,  Tatsuya Narahara

IPC分类号： G11B5/53 ,  G11B7/003 ,  G11B15/61 ,  G11B15/64 ,  G11B7/12

CPC分类号： G11B7/0031 ,  G11B15/61 ,  G11B15/64 ,  G11B5/53

摘要： A rotary drum assembly comprises a stationary member having a stationary cylindrical portion, and a rotary member having substantially the same diameter as that of the stationary member and positioned in the vicinity of the stationary member so as to be relatively stationary to the stationary member. Each of surfaces of the rotary member and the stationary member opposing to each other is formed to have a step structure having a plurality of opposed surfaces, and pump-out type spiral grooves are formed on at least two of the plurality of opposed surfaces of one of the rotary and stationary members.

摘要翻译： 旋转鼓组件包括具有固定圆筒部分的固定部件和具有与固定部件基本相同的直径的旋转部件，并且定位在固定部件附近，以便相对于静止部件固定。 旋转构件和彼此相对的固定构件的每个表面形成为具有多个相对表面的台阶结构，并且在一个的多个相对表面中的至少两个上形成有泵出型螺旋槽 的旋转和静止构件。

公开(公告)号：US06515833B1

公开(公告)日：2003-02-04

申请号：US09374594

申请日：1999-08-16

申请人： Toshio Shirai ,  Tadashi Ozue ,  Yoshiteru Kamatani ,  Ichiro Hashimoto

发明人： Toshio Shirai ,  Tadashi Ozue ,  Yoshiteru Kamatani ,  Ichiro Hashimoto

IPC分类号： G11B552

CPC分类号： G11B5/584 ,  G11B5/588 ,  G11B15/61

摘要： A rotating drum assembly, and a magnetic recording/reproducing apparatus including the rotating drum assembly, are provided. The rotating drum assembly comprises a cylindrical rotating drum; a magneto-resistive head installed on the rotating drum to project at least a part thereof from the outer surface of the rotating drum; and a tape-contact piece installed on the rotating drum so as to project from the outer surface of the rotating drum and to be in contact with the surface of a magnetic tape; the tape-contact piece being formed to have a larger tape-contact width than that of the magneto-resistive head and disposed to be in earlier contact with the magnetic tape than the magneto-resistive head.

摘要翻译： 提供旋转鼓组件和包括旋转鼓组件的磁记录/再现装置。 旋转鼓组件包括圆柱形旋转鼓; 安装在所述旋转滚筒上以从所述旋转滚筒的外表面突出其至少一部分的磁阻头; 以及安装在所述旋转滚筒上以从所述旋转滚筒的外表面突出并且与所述磁带表面接触的带接片; 该带接触片被形成为具有比磁阻头更大的带接触宽度，并被设置为比磁阻头更早地与磁带接触。

公开(公告)号：US06297631B1

公开(公告)日：2001-10-02

申请号：US09329714

申请日：1999-06-10

申请人： Tadashi Ozue ,  Toshio Shirai ,  Yoshiteru Kamatani ,  Tomohiro Ikegami ,  Takehiko Saito

发明人： Tadashi Ozue ,  Toshio Shirai ,  Yoshiteru Kamatani ,  Tomohiro Ikegami ,  Takehiko Saito

IPC分类号： G11B539

CPC分类号： G11B5/00813 ,  G11B5/0086 ,  G11B5/02 ,  G11B5/035 ,  G11B2005/0018 ,  Y10T29/49036

摘要： A magnetic signal reproducing apparatus which can lessen fluctuation of reproduced outputs in reproducing magnetic signals recorded in a magnetic tape by a magneto-resistance effect type magnetic head even if a magnetic tape sliding face of the magneto-resistance effect type magnetic head is abraded. A current value of a sense current when a voltage fluctuation level of the sense current caused when a magnetic field in the normal direction is applied to a magneto-resistance effect element of the magneto-resistance effect type magnetic head is equal with a voltage fluctuation level of the sense current caused when a magnetic field in the opposite direction is applied thereto is set to a predetermined value I0. Then, the current value of the sense current supplied to the magneto-resistance effect element of the magneto-resistance effect type magnetic head is set to be greater than I0 in reproducing the magnetic signals recorded in the magnetic tape.

摘要翻译： 即使磁阻效应型磁头的磁带滑动面被磨损，磁信号重放装置也可以通过磁阻效应型磁头来再现记录在磁带中的磁信号中的再现输出的波动。 在向磁阻效应型磁头的磁阻效应元件施加法线方向的磁场所引起的检测电流的电压波动电平时的感应电流的电流值与电压波动水平相等 在施加相反方向的磁场时产生的感测电流被设定为预定值I0。 然后，在再现记录在磁带中的磁信号时，提供给磁阻效应型磁头的磁阻效应元件的感测电流的当前值被设置为大于I0。

公开(公告)号：US5559766A

公开(公告)日：1996-09-24

申请号：US500028

申请日：1995-07-10

申请人： Takashi Nakao ,  Kiyoshi Ohsato ,  Yoshiteru Kamatani ,  Tatsuya Narahara ,  Tadashi Ozue

发明人： Takashi Nakao ,  Kiyoshi Ohsato ,  Yoshiteru Kamatani ,  Tatsuya Narahara ,  Tadashi Ozue

IPC分类号： G11B7/09 ,  G11B7/003 ,  G11B7/0033

CPC分类号： G11B7/0031 ,  G11B7/0901 ,  G11B7/0033

摘要： An optical recording method and an optical recording apparatus enable recording information on recording tracks substantially corresponding to ideal reference tracks, on an optical recording medium without preformatted tracks. The optical recording medium is scanned by a rotating optical scanning system using a scanning light beam emitted by an external light source to record information on the optical recording medium. Prior to recording the information on the optical recording medium, information recorded on a reference track recording medium provided with ideal reference tracks is reproduced in a tracking control mode to acquire tracking control data and the tracking control data is stored in a waveform memory. In recording information on the optical recording medium, the rotating optical scanning system is controlled on the basis of the previously stored tracking control data so that the scanning spot traces recording tracks corresponding to the ideal reference tracks.

摘要翻译： 光学记录方法和光学记录装置使得能够在没有预格式化轨道的光学记录介质上将基本上对应于理想基准轨道的记录轨道上的信息进行记录。 光记录介质通过使用由外部光源发射的扫描光束的旋转光学扫描系统进行扫描，以在光学记录介质上记录信息。 在光记录介质上记录信息之前，以跟踪控制模式再现记录在具有理想基准轨道的基准轨道记录介质上的信息，以获取跟踪控制数据，并且将跟踪控制数据存储在波形存储器中。 在光记录介质上记录信息时，基于先前存储的跟踪控制数据来控制旋转光扫描系统，使得扫描点跟踪对应于理想参考轨道的记录道。